Chapter 1 Properties of air Chapter 2 The composition of air Chapter 3 Air and daily life Chapter 4 Air and man Chapter 5 Air and plants Chapter 6 The importance of fresh air to our health Chapter 7 Dry cells, conductors and insulators Chapter 8 What can electricity do? Chapter 9 Electricity and daily life Chapter 10 Using electricity safely Chapter 11 The shape and structure of the earth Chapter 12 Land and oceans